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Long-Term Debt Long-Term Debt (Policies)
12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]  
Debt Issuance Costs
Debt Issuance Costs. Our policy is to capitalize legal fees, accounting fees, underwriting fees, printing costs, and other direct expenses associated with issuing debt. The costs associated with our senior notes were amortized on an effective interest basis over the term of the senior notes, while issuance costs related to our line of credit arrangement are capitalized and then amortized ratably over the term of the line of credit arrangement, regardless of whether there are any outstanding borrowings.